--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/doodle/dia/tool.d	Sun Aug 02 16:27:21 2009 +0930
@@ -0,0 +1,49 @@
+module doodle.dia.tool;
+
+public {
+    import cairo.Context;
+    import doodle.dia.icanvas;
+    import doodle.tk.events;
+}
+
+/*
+interface IToolStack {
+    void push(Tool tool);
+    void pop();
+    void replace(Tool tool);
+}
+*/
+
+abstract class Tool {
+    /*
+    enum Response {
+    START, CONTINUE, FINISH
+
+    }
+    */
+
+    /*
+    abstract bool is_sticky();
+    abstract bool is_replaceable();
+    */
+
+    /*
+    abstract void start(IToolStack tool_stack);
+    abstract void stop(IToolStack tool_stack);
+    */
+
+    bool handle_button_press(scope Viewport viewport, in ButtonEvent event) { return false; }
+    bool handle_button_release(scope Viewport viewport, in ButtonEvent event) { return false; }
+    bool handle_motion(scope Viewport viewport, in MotionEvent event) { return false; }
+    bool handle_scroll(scope Viewport viewport, in ScrollEvent event) { return false; }
+    //bool handle_enter(scope viewport, CrossingEvent event) { return false; }
+    //bool handle_leave(scope viewport, CrossingEvent event) { return false; }
+    //bool handle_focus_in(scope viewport, FocusEvent event) { return false; }
+    //bool handle_focus_out(scope viewport, FocusEvent event) { return false; }
+    bool handle_key_press(scope Viewport viewport, in KeyEvent event) { return false; }
+    bool handle_key_release(scope Viewport viewport, in KeyEvent event) { return false; }
+
+    void draw(in Viewport viewport,
+              in Rectangle pixel_damage, scope Context pixel_cr,
+              in Rectangle model_damage, scope Context model_cr) const { }
+}